Did the Reapers reap other Galaxies?

I always wondered about this? I mean the Reapers are supposedly millions if not billions of years old. Plenty of time to traverse the vast distances between the galaxies, especially since they were closer together billions of year ago.

Maybe the reapers are like galactic small frys just picking on low tech creature like humans and turians, whilst they themselves are regularly picked on by some large far more advance race.

Rudimentary creatures of blood and flesh. You touch my mind, fumbling in ignorance, incapable of understanding.
You exist because we allow it, and you will end because we demand it.
Sovereign
Mass Effect

A man smarter than myself would've read this and thusly observed "...dafuq?"

First off... the OP is presupposing there is some species that exists called "Reapers". I'm still trying to get my head around that...

Isn't it immature that you call him Donald "Dump"?
I agree, it's childish and stupid - and that's my point. it's meant as a deliberate mockery of his blatant disrespect via using "Crooked Hillary", and thus I can call him "Dump" since he dumps his campaign promises, dumps campaign managers, dumps his wives, wants to dump the first amendment, dumps common-sense war ethics and dumps the use of proper English in favor of a mongrel white-trash dialect.

'Twas a cutlass swipe or an ounce of lead
Or a yawing hole in a battered head
And the scuppers clogged with rotting red
And there they lay I damn me eyes
All lookouts clapped on Paradise
All souls bound just contrarywise, yo ho ho and a bottle of rum!

It's possible, especially with the information in the Leviathan DLC, but seems unlikely because they seem way too centered on our galaxy. Additionally, the ME3 ending suggests there aren't other groups of reapers out there, unless they are completely independent, but that doesn't make sense.

I always wondered about this? I mean the Reapers are supposedly millions if not billions of years old. Plenty of time to traverse the vast distances between the galaxies, especially since they were closer together billions of year ago.

Maybe the reapers are like galactic small frys just picking on low tech creature like humans and turians, whilst they themselves are regularly picked on by some large far more advance race.

Reapers did not reap other galaxies. They focused solely on the milky way. Through Levithan and some of the extended cut, you get the sense that the reapers have been 'farming' the galaxy in a kind of experiment. When they were not reaping, they go to dark space and sleep.

I would not be surprised if future entries in mass effect might deal with the fact that the milky way is now technically 'unguarded' from all the other galaxies that didn't have to deal with this reapin nonsense.